1 named cultivar
The Story
Plant Bio
Aconitum carmichaelii, commonly known as Carmichael's monkshood, is a perennial plant known for its tall spikes of hooded blue flowers and toxic properties.
This species is particularly valued for its late summer flowering when fewer plants are in bloom.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Perennial
Height
48 inches
Width
18 inches
Light
Partial Sun
Zones
4, 5, 6, 7, 8
Water
Consistent moisture
Humidity
Moderate
Lifespan
Perennial
Native To
East Asia
Toxicity
Highly toxic; all parts are poisonous
Planting
How to Grow
- Tuck seeds into well-draining soil in early spring.
- Mist cuttings regularly to maintain humidity and promote rooting.
- Provide partial shade to protect from harsh afternoon sun.
- Water consistently, keeping soil moist but not waterlogged.
- Apply a balanced fertilizer in spring and mid-summer.
- Divide mature plants in early spring or fall for propagation.
Pro Tip
Mulch around plants to retain moisture and suppress weeds.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist 🌱
- Prune dead or damaged stems in early spring
- Fertilize twice during the growing season
Don't
- Avoid overwatering to prevent root rot ❌
- Do not expose to full midday sun in hot climates
- Refrain from disturbing roots when dividing
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Stake | ||||||||||||
| Winter Prep |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Multiply
Propagation Methods
Good to Know
Common Questions
Carmichael's Monkshood questions
What zones can Carmichael's Monkshood grow in?
Carmichael's Monkshood is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Carmichael's Monkshood deer resistant?
Not reliably. Deer may browse Carmichael's Monkshood, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Carmichael's Monkshood bloom?
Carmichael's Monkshood typically blooms in late summer through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Carmichael's Monkshood need full sun?
Carmichael's Monkshood does best in part shade.
More Aconitum to compare
Keep exploring
Explore the genus
Hardy in your zone?
Grow Carmichael's Monkshood with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.